Hello smallF,
I connected the Rx, Tx, Ground pins of the sim300 EVB with the Tx,Rx, Ground pins of the pic16f877(using easypic6 development board) and i managed to send data(AT commands to the module) from pic microcontroller to sim300. The problem is that pic microcontroller can not receive any data from the sim300. Is there any other specific connection between serial pins that must be done in order to receive data? What do you mean by "source voltage and current rating for SIM 300 GPRS Module"?
Thks,
ZZ